<template>
    <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

     <!-- 卡片视图区域 -->
     <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区域 -->
        <el-table :data="rolelist" border stripe>
            <!-- 展开列 -->
             <el-table-column type="expand">
             <template slot-scope="scope">
              <el-row :class="['bdbottom', i1 ===0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                 <el-col :span="19">
                  <el-row :class="['bdtop', i2 ===0 ? '' : 'bdtop', 'vcenter']"  v-for="(item2, i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{ item3.authName }}</el-tag>
                    </el-col>
                  </el-row>
                 </el-col>
              </el-row>
              <!-- <pre>{{ scope.row }}</pre> -->
             </template>
             </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column label="角色列表" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
                    <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
     </el-card>
     <!-- 分配权限对话框 -->
     <el-dialog title="分配权限" :visible.sync="SetRightDialogVisible" width="50%" @close="SetRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="SetRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="SetRightDialogVisible = false;allotRights()">确 定</el-button>
      </span>
    </el-dialog>
     <!-- 添加用户的对话框 visible控制对话框的显示和隐藏 -->
     <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
          <!-- 内容主体区域 prop验证规则对象的属性 -->
          <el-form :model="addForm"  ref="addFormRef" label-width="70px">
            <el-form-item label="角色名称" prop="roleName">
              <el-input v-model="addForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
              <el-input v-model="addForm.roleDesc"></el-input>
            </el-form-item>
          </el-form>
          <!-- 底部区域 -->
          <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addUser">确 定</el-button>
          </span>
        </el-dialog>
     <!-- 修改用户的对话框 -->
     <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
          <el-form :model="editForm"  ref="editFormRef" :rules="editFormRules" label-width="100px">
            <el-form-item label="角色列表" prop="roleName">
              <el-input v-model="editForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
              <el-input v-model="editForm.roleDesc"></el-input>
            </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editRoleInfo">确 定</el-button>
          </span>
        </el-dialog>
     </div>
</template>
<script>

export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      SetRightDialogVisible: false,
      // 需要被分配角色的用户信息
      userinfo: {},
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 即将分配权限的id
      roleId: '',
      // 查询到的角色信息对象
      editForm: {},
      // 修改表单的验证对象规则
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { validator: 'checkRoleName', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { validator: 'checkRoleDesc', trigger: 'blur' }
        ]
      },
      // 添加用户的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      addDialogVisible: false,
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false
    }
  },
  created () {
    this.getRoleList()
  },
  methods: {
    async getRoleList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮 添加新用户
    addUser () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return false
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败！')
        }
        this.$message.success('添加用户成功')
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        // 重新获取用户列表数据
        this.getRoleList()
      })
    },
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永远删除该文件,是否继续？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }
      ).catch(err => err)
      if (confirmResult !== 'confirm') { return this.$message.info('取消了删除') }
      // console.log('确认了删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) { return this.$message.err('删除权限失败') }
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) { return this.$message.error('获取权限失败！') }
      // 把获取到的数据保存到 data 中
      this.rightsList = res.data
      console.log(this.rightsList)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.SetRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前 node节点不包含 children 属性，则是三级节点
      if (!node.children) { return arr.push(node.id) }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限对话框的关闭事件
    SetRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配事件
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      // console.log(keys)  用英文逗号拼接
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功')
      this.getRoleList()
      this.SetRightDialogVisible = false
    },
    // 展示编辑用户的对话框
    async showEditDialog (id) {
      // console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改角色信息并提交
    editRoleInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return false
        // 发起修改用户的数据请求
        const { data: res } = await this.$http.put(`roles/${this.editForm.roleId}`, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败！')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRoleList()
        // 提示修改成功
        this.$message.success('更新角色信息成功')
      })
    },
    async removeRoleById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除改角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        canaelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消了删除， 则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // console.log('确认了删除')
      const { data: res } = await this.$http.delete('roles/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败!')
      }

      this.$message.success('删除用户成功')
      this.getRoleList()
    }
  }
}
</script>
<style scoped lang="less">
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
